Answer:
Option C. The slogan "Come to ILTC! We offer great programs for business owners! has a flaw as it does not describe what type of program it is advertising.
Explanation:
The slogan would need to add a description of what type of programs for businesses does the company offers in order to be completed and more efficient. All the other options are incorrect, as it does mention the company's name, ILTC. It also is written in an exciting manner, by using the exclamation point (!) and it is a complete sentence.